Oh yeah...I'm in Jackson, Ga today. At the Pilot truck stop, they have Delo SDE, Valvoline Premium Blue (15W40) and Kendall 15W40 in the CK-4 flavor.
The Kendall has all of the usual HDEO specs listed but not SN rated. The Valvoline does list it as CK-4/SN. Valvoline is lacking the E9 and MB228.31 that we normally see listed. It only lists the Cat, Cummins, Mack/Volvo and Detroit specs if remember correctly. No idea if their website says different than what is on the bottle.
Still haven't seen the Delvac CK-4 yet.